TDF8546_SDS All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
Product short data sheet Rev. 8 — 27 September 2013 13 of 21
NXP Semiconductors
TDF8546
I
2
C-bus controlled 4 45 W best efficiency amplifier
[1] V
STB
depends on the current into pin STB: minimum = (1429 I
STB
) + 5.4 V, maximum = (3143 I
STB
)+5.6V.
[2] The times are specified without leakage current. For a leakage current of 5 A on pin SVR, the delta time is specified. If the capacitor
value on pin SVR changes 30 %, the specified time also changes 30 %. The specified times include an ESR of 15 for the
capacitor on pin SVR.
[3] Standard I
2
C-bus specification: maximum LOW-level = 0.3V
DD
, minimum HIGH-level = 0.7V
DD
. To comply with 5 V and 3.3 V logic,
V
DD
= 5 V defines the maximum LOW-level and V
DD
= 3.3 V defines the minimum HIGH-level.
[4] For optimum channel separation (
cs
), supply voltage ripple rejection (SVRR) and common mode rejection ratio (CMRR), a resistor
must be in series with the ACGND capacitor.
[5] The plop-noise during amplifier switch-on and switch-off is measured using an ITU-R 2 k filter; see Figure 4
.
V
o
output voltage variation plop during switch-on and
switch-off; best efficiency mode
[5]
from off to mute and mute to off - - 7.5 mV
from mute to on and on to mute
(soft mute)
--7.5mV
from off to on and on to off
(start-up diagnostic enabled)
--7.5mV
V
n(o)
output noise voltage filter 20 Hz to 22 kHz (6
th
order);
R
S
=1k
mute mode - 15 23 V
line driver mode - 25 33 V
amplifier mode; best efficiency
mode
-4365V
amplifier mode; best efficiency
mode; R
S
=50
-4060V
G
v(amp)
voltage gain amplifier mode single-ended in to differential out;
best efficiency mode
25.5 26 26.5 dB
G
v(ld)
voltage gain line driver mode single-ended in to differential out;
best efficiency mode
15.5 16 16.5 dB
Z
i
input impedance T
amb
= 40 C to +105 C3862105k
T
amb
= 0 C to 105 C5562105k
mute
mute attenuation V
o(on)
/V
o(mute)
; V
i
=50mV 80 92 - dB
V
o(mute)(RMS)
RMS mute output voltage V
i
= 1 V RMS;
filter 20 Hz to 22 kHz
-1629V
B
p
power bandwidth 1 dB - 20 to
20000
-Hz
C
L(crit)
critical load capacitance no oscillation; R
L
between 2
and open load; C
L
from all
outputs to GND
22--nF
Best efficiency mode control
V
o(swoff)be
best efficiency switch-off output
voltage
best efficiency switch open
4 load selected; IB5[D4] = 1 - 0.9 - V
2 load selected; IB5[D4] = 0 - 1.7 - V
R
sw(be)
best efficiency switch resistance - 1.0 -
Table 5. Characteristics
…continued
T
amb
=25
C; V
P
= 14.4 V; unless otherwise specified. Tested at T
amb
= 25
C; guaranteed for T
j
=
40
C to +150
C;
functionality is guaranteed for V
P
< 10 V unless otherwise specified.
Symbol Parameter Conditions Min Typ Max Unit
